Axial force limiting retaining device

Abstract

The utility model relates to an axial force limiting retaining device which is characterized by comprising an action rod (1) used for transmitting acting force, a fixing element (3), a first adjusting screw plug (2), a first disc spring set (4), a first guide rod (5), a second guide rod (7), a squeezing-off column (6), a second disc spring set (8), a second adjusting screw plug (9), the second guide rod (7), the first guide rod (5), the second disc spring set (8) and the first disc spring set (4). The second adjusting screw plug (9) and the first adjusting screw plug (2) are respectively and symmetrically arranged with the extrusion column (6); the head of the trailable column (6) is provided with a trapezoidal protrusion, the angle and the size of the trapezoid are consistent with those of the trapezoidal groove, and the tail of the trailable column (6) is provided with two symmetrical slopes. The device is simple in structure and high in reliability, so that the maximum limiting force of the rod piece can be kept under the condition that the device is not damaged, the problem of alternating fatigue fracture of the device is avoided, the reliability of equipment is improved, and the traveling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to an axial force limiting and maintaining technology in railway turnout conversion equipment, in particular to an axial force limiting and maintaining device. Background Art

[0002] At present, the force limit holding mechanism of the action rod of the switch machine in China is a steel pin connecting the action rod and the locking device, one section of which is located in the action rod and the other section of which is located in the locking device. The pin controls the size of the parts so that the maximum shear force at its application position is within the specified limit range. The pin plays a role in transmitting the output force of the switch machine when the switch machine is converted and the turnout is locked. When the axial force on the action rod exceeds the limit, the pin is sheared and broken, and the action rod is separated from the two sections in the locking device. The action rod can slide along the axial direction, thereby protecting the movable rail of the turnout and the switch machine.

[0003] When the switch is used on site, there are two states: one is the switching state and the other is the locking state. The switch is either in the switching state or in the locking state. When the switch needs to be switched, the switch will switch the switch after receiving the command. The steel pin connected to the operating rod transmits the switching force of the switch to the switch. When the switch is completed, the operating rod locks the movable part of the switch, and the pin bears the locking force of the operating rod on the switch. Therefore, the pin is always under stress. In addition, when the train passes through the switch, the impact of the train wheels on the movable rail of the switch will also be transmitted to the pin through the connecting rod, causing the pin to be prone to fatigue fracture, causing equipment failure and affecting driving efficiency. Utility Model Content

[0004] The utility model aims to provide an axial force limiting retaining device with simple structure and high reliability, so as to maintain the maximum force limit of the rod without damaging the device, avoid the problem of alternating fatigue fracture of the device, improve the reliability of the equipment, and improve driving efficiency.

[0005] The technical solution of the utility model is to relate to an axial force limiting and retaining device, which is characterized in that it includes: an action rod for transmitting an action force, a fixing element, a first adjusting screw, a first disc spring group, a first guide rod, a second guide rod, an extrusion column, a second disc spring group, a second adjusting screw, the second guide rod and the first guide rod, the second disc spring group and the first disc spring group, the second adjusting screw and the first adjusting screw are respectively symmetrically installed with the extrusion column; a trapezoidal protrusion is arranged on the head of the extrusion column, the angle and size of the trapezoid are consistent with the trapezoidal groove, and two symmetrical inclined surfaces are arranged at the tail of the extrusion column; the first guide rod head is arranged with the same inclined surface as the tail of the first extrusion column, and the cylindrical part of the tail of the first guide rod, the first disc spring group and the second adjusting screw are coaxial with the first disc spring group.

[0006] Two trapezoidal grooves are arranged in the middle of the actuating rod, and the trapezoidal grooves are symmetrical along the axis of the actuating rod.

[0007] The matching depth between the trapezoidal groove of the action rod and the trapezoidal protrusion of the head of the extrusion column is 2.5 mm.

[0008] There are two extrusion columns, which are arranged side by side in the axial direction of the actuating rod.

[0009] When the axial displacement of the actuating rod relative to the fixed element is greater than 2.5 mm, the extrusion column is separated from the groove connection of the actuating rod, and the actuating rod is axially slidably connected with the rack block.

[0010] The action rod is elastically connected to the fixing element, and the second disc spring group and the first disc spring group can absorb the impact of the rod.

[0011] The head of the actuating rod is on the left or right side of the fixing element.

[0012] The advantages of the utility model are:

[0013] ⑴ The force limit holding mechanism has a simple structure, good processing technology, easy adjustment, and does not affect the adjustment and detection methods of equipment parameters and indicators.

[0014] (2) There is no connecting pin between the actuating rod and the fixing element, thus avoiding mechanical fatigue damage of the connecting pin.

[0015] ⑶ It can directly replace the force limiting device of some current switch machines.

[0016] The utility model is further described below in conjunction with the accompanying drawings of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a force-limiting holding mechanism of Embodiment 1 of the present utility model;

[0018] Figure 2 It is a schematic diagram of the force limiting and holding mechanism of Example 2 of the utility model.

[0019] In the figure, 1, the actuating rod; 2, the first adjusting screw plug; 3, the fixing element; 4, the first disc spring group; 5, the first guide rod; 6, the extrusion column; 7, the second guide rod; 8, the second disc spring group; 9, the second adjusting screw plug. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments. Example 1

[0021] like Figure 1As shown, the utility model relates to an axial force limiting and retaining device, comprising: an action rod 1 for transmitting a force, a first adjusting screw 2, a fixing element 3, a first disc spring group 4, a first guide rod 5, an extrusion column 6, a second guide rod 7, a second disc spring group 8, a second adjusting screw 9, the second guide rod 7 and the first guide rod 5, the second disc spring group 8 and the first disc spring group 4, the second adjusting screw 9 and the first adjusting screw 2 are respectively symmetrically installed with the extrusion column 6; a trapezoidal protrusion is arranged at the head of the extrusion column 6, the angle and size of the trapezoid are consistent with the trapezoidal groove, and two symmetrical inclined surfaces are arranged at the tail of the extrusion column 6; the head of the first guide rod 5 is arranged with the same inclined surface as the tail of the first extrusion column 6, the cylindrical part of the tail of the first guide rod 5, the first disc spring group 4, and the second adjusting screw 9 can compress the first disc spring group 4 along the axial direction to generate axial preload.

[0022] When the action rod 1 is subjected to axial force, the position of the fixing element 3 is fixed, and two trapezoidal grooves are provided in the middle of the action rod 1, which are symmetrical along the axis of the action rod 1. The action rod 1 can be installed from the left side of the fixing element 3 with the head of the action rod 1 on the left side, or can be installed from the right side of the fixing element 3 with the head of the action rod 1 on the right side.

[0023] The first disc spring group 4 and the second disc spring group 8 generate horizontal pressure, which acts on the first extrusion column 6 along the axial direction of the first guide rod 5 and the second guide rod 7. The first guide rod 5 and the second guide rod 7 cooperate with the inclined surface at the tail of the first extrusion column 6 to convert the horizontal force into an upward force, and press the trapezoidal protrusion at the head of the first extrusion column 6 into the trapezoidal groove of the actuating rod 1. The pre-pressure generated by the two disc spring groups prevents the actuating rod 1 from moving along its axial direction.

[0024] By adjusting the screwing depth of the first adjusting screw plug 2 and the second adjusting screw plug 9, the pre-pressure generated by the extrusion column 6 on the actuating rod 1 can be adjusted. When the fixing element 3 is fixed, the force acting on the axis of the actuating rod 1 is transmitted to the extrusion column 6 through the inclined surface. The extrusion column 6 cannot move in the left and right directions and can only move downward along the axial direction of the extrusion column 6. The inclined surface at the tail end transmits the force to the first adjusting screw plug 2 and the second adjusting screw plug 9.

[0025] The matching depth between the trapezoidal groove of the actuating rod 1 and the trapezoidal protrusion at the head of the extrusion column 6 is greater than 2.5 mm.

[0026] When the inclined groove of the action rod 1 pushes the extrusion column 6 to move downward, the required axial force will gradually increase, and the action rod 1 will be slightly displaced axially with the fixed element 3. When the displacement is greater than 2.5 mm, when the extrusion column 6 is separated from the inclined groove of the action rod 1, the movement of the action rod 1 no longer produces axial compression on the extrusion column 6, and the force value is the maximum limit at this time.

[0027] The maximum limit of the force can be adjusted to a specified value range by the first adjusting screw plug 2 and the second adjusting screw plug 9.

[0028] The second guide rod 7 , the second disc spring assembly 8 , and the second adjusting screw plug 9 are the same as the first guide rod 5 , the first disc spring assembly 4 , and the first adjusting screw plug 2 , and are symmetrically installed.

[0029] In the utility model, the actuating rod 1 and the fixed element 3 have no connecting pin and are connected under the pressure of the first disc spring group 4 and the second disc spring group 8. When the axial force of the actuating rod 1 is below the limit force, there is no obvious relative movement between the actuating rod 1 and the fixed element 3. When the axial force of the actuating rod 1 exceeds the limit force, the actuating rod 1 can move axially relative to the fixed element 3.

[0030] When the axial displacement of the actuating rod 1 relative to the fixing element 3 is greater than 2.5 mm, the extrusion column 6 is separated from the groove connection of the actuating rod 1, and the actuating rod 1 can slide axially relative to the rack block.

[0031] The action rod 1 is elastically connected to the fixing element 3, and the disc spring assembly can absorb the impact of the rod.

[0032] The head of the actuating rod 1 may be on the left side of the fixing element 3 to bear the axial force from the left side, or the head of the actuating rod 1 may be on the right side of the fixing element 3 to bear the axial force from the right side. Example 2

[0033] like Figure 2 As shown, in Example 2, there are two extrusion columns 6, which are arranged side by side in the axial direction of the actuating rod 1. The two extrusion columns 6 receive the pressure generated by the first disc spring group 4 and the second disc spring group 8 on both sides respectively. The fixing or connection method of other parts is the same as that of Example 1.

[0034] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An axial force limiting and retaining device, characterized in that: include: An action rod (1), a fixing element (3), a first adjusting screw plug (2), a first disc spring group (4), a first guide rod (5), a second guide rod (7), an extrusion column (6), a second disc spring group (8), a second adjusting screw plug (9), the second guide rod (7) and the first guide rod (5), the second disc spring group (8) and the first disc spring group (4), the second adjusting screw plug (9) and the first adjusting screw plug (2) are respectively symmetrically mounted with the extrusion column (6); a trapezoidal protrusion is arranged at the head of the extrusion column (6), the angle and size of the trapezoid are consistent with the trapezoidal groove, and two symmetrical inclined surfaces are arranged at the tail of the extrusion column (6); the first guide rod (5) is arranged at the head of the first guide rod (5) with the same inclined surface as the tail of the first extrusion column (6), and the cylindrical part of the tail of the first guide rod (5), the first disc spring group (4) and the second adjusting screw plug (9) are coaxial with the first disc spring group (4).

2. The axial force limiting and retaining device according to claim 1, characterized in that: Two trapezoidal grooves are arranged in the middle of the actuating rod (1), and the trapezoidal grooves are symmetrical along the axis of the actuating rod (1).

3. The axial force limiting and retaining device according to claim 1, characterized in that: The trapezoidal groove of the actuating rod (1) cooperates with the trapezoidal protrusion on the head of the extrusion column (6), and the cooperation depth is greater than 2.5 mm.

4. The axial force limiting and retaining device according to claim 1, characterized in that: There are two extrusion columns (6), which are arranged side by side in the axial direction of the actuating rod (1).

5. The axial force limiting and retaining device according to claim 1, characterized in that: When the axial displacement of the actuating rod (1) relative to the fixing element (3) is greater than 2.5 mm, the extrusion column (6) is separated from the groove connection of the actuating rod (1), and the actuating rod (1) is axially slidably connected to the rack block.

6. The axial force limiting and retaining device according to claim 1, characterized in that: The action rod (1) is elastically connected to the fixing element (3), and the second disc spring group (8) and the first disc spring group (4) can absorb the impact of the rod.

7. The axial force limiting and retaining device according to claim 1, characterized in that: The head of the actuating rod (1) is on the left or right side of the fixing element (3).

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